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annotate src/hermes/mmx_main.asm @ 3950:9d9e15ab1697 SDL-1.2

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Check if yasm supports a nasm-specific syntax we use (it doesn't in 0.5.0, which is still common in Linux distros, and does in 0.6.0). Disable it if we don't, attempting to fallback to using nasm. Thanks to Mike Frysinger for the patch. Fixes Bugzilla #393.
author Ryan C. Gordon <icculus@icculus.org>
date Mon, 04 Jun 2007 11:06:48 +0000
parents eb4d9d99849b
children 180fa05e98e2
rev   line source
0
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1 ;
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2 ; mmx format converter main loops for HERMES
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3 ; Some routines Copyright (c) 1998 Christian Nentwich (c.nentwich@cs.ucl.ac.uk)
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4 ; This source code is licensed under the GNU LGPL
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5 ;
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6 ; Please refer to the file COPYING.LIB contained in the distribution for
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7 ; licensing conditions
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8 ;
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9
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10 BITS 32
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11
1873
eb4d9d99849b Renamed, per Mike's comment on bug #157
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12 %include "common.inc"
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13
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14 SDL_FUNC _ConvertMMX
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15 SDL_FUNC _mmxreturn
0
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16
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17 SECTION .text
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18
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19 ;; _ConvertMMX:
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20 ;; [ESP+8] ConverterInfo*
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21 ;; --------------------------------------------------------------------------
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22 ;; ConverterInfo (ebp+..)
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23 ;; 0: void *s_pixels
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24 ;; 4: int s_width
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25 ;; 8: int s_height
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26 ;; 12: int s_add
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27 ;; 16: void *d_pixels
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28 ;; 20: int d_width
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29 ;; 24: int d_height
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30 ;; 28: int d_add
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31 ;; 32: void (*converter_function)()
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32 ;; 36: int32 *lookup
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33
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34 _ConvertMMX:
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35 push ebp
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36 mov ebp,esp
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37
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38 ; Save the registers used by the blitters, necessary for optimized code
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39 pusha
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40
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41 mov eax,[ebp+8]
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42
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43 cmp dword [eax+4],BYTE 0
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44 je endconvert
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45
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46 mov ebp,eax
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47
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48 mov esi,[ebp+0]
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49 mov edi,[ebp+16]
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50
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51 y_loop:
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52 mov ecx,[ebp+4]
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53
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54 jmp [ebp+32]
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55
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56 _mmxreturn:
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57 add esi,[ebp+12]
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58 add edi,[ebp+28]
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59
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60 dec dword [ebp+8]
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61 jnz y_loop
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62
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63
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64 ; Restore the registers used by the blitters, necessary for optimized code
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65 popa
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66
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67 pop ebp
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68
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69 endconvert:
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70 emms
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71
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72 ret
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73
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74 %ifidn __OUTPUT_FORMAT__,elf
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75 section .note.GNU-stack noalloc noexec nowrite progbits
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76 %endif